100amp alternator

kmccabe56

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Looking to upgrade my '79 wagon 225-2v to a 100amp alternator. Finding the alternator is the least of it. The mounting brackets seem to be unique to the 100amp. The parts catalog shows a dual belt drive for this alternator, but only a single groove pulley on the fan as well as on the crank.

Anybody have a factory built car with 100amp alternator. How was it hooked up?

And of course, if anybody has any of the brackets and/or pulleys, I'm interested!
 

Duke5A

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Are you adding anything to the electrical load of the car or just want to upgrade because the factory alternator can't keep up? If the latter then you don't need a higher rated alternator. The low RPM charging performance of the factory setups just suck. A 60 amp internally regulated Denso alternator will charge circles around a stock 70 amp square back.

I used one in my car before adding electric fans and EFI. Lights stopped dimming at idle and the blower motor never slowed down. They make mounting kits for SB and BB, but for /6 you're probably going to have to make your own.
 

Oldiron440

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I wouldn’t wast my time with a factory 100 amp with so many aftermarket alternators out there. I believe you would need a wiring harness also for the factory 100 amp alternator.
 

SRTMirada

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The 100 amp alternator is a real workhorse. It weighs 8 lbs. more than the conventional alternator. Most Canadian cars came with them due to the rear window defroster. You definitely need to upgrade the wiring harness with this upgrade. A donor car would be the way to go.
 

Mikes5thAve

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The 100 amp alternator is a real workhorse. It weighs 8 lbs. more than the conventional alternator. Most Canadian cars came with them due to the rear window defroster. You definitely need to upgrade the wiring harness with this upgrade. A donor car would be the way to go.
For some reason it was mainly J bodies that applies to, maybe because of the bigger rear window? Canadian M bodies got the normal alternator unless it was police or taxi package.
 

kmccabe56

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Cordoba1

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This will fix your dim lights at idle and will use all of your current factory mounting brackets and bolts. Internal regulator so you will just need to bypass the regulator.

Powermaster 75091 Powermaster Retro Alternators | Summit Racing
Yes, Yes, and more Yes. I installed one of these in my 81 Slant 6 Cordoba. You can eliminate the firewall mounted regulator. One-wire hookup -- Don't have to upgrade the harness. Just tape off the regulator wires at the original alternator, hook up the "one wire", and you're done. It'll take you an hour. 15 minutes if you're a pro.
 

Hayzoos

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Yep, absolutely the way to go. That's what I would get if I needed an alternator. Price is not out of the ballpark. No longer need to adapt a Delco for a one wire hookup and it looks OEM.
 

kmccabe56

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The 100 amp alternator is a real workhorse. It weighs 8 lbs. more than the conventional alternator. Most Canadian cars came with them due to the rear window defroster. You definitely need to upgrade the wiring harness with this upgrade. A donor car would be the way to go.
My U.S. spec wagon came with a/c and I've purchased a Canadian spec wagon that only has a heated rear window. Both seem to have the same alternator. I'm adding the heated rear window to the a/c car as well as a rear wiper from an '80.

Interestingly the U.S. wagon didn't come with a lockup torque converter. The Canadian wagon did, but it doesn't lock up until 54mph. I've also bought two U.S. spec sedans as parts cars. They both had lockups and they locked up at 35mph.
 

69-

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54 miles per hour?
Mine locks up at 50 kilometres per hour.
2.47 rear end.
 

SRTMirada

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Apparently not as many Canadian cars had the 100 amp alternator as I thought. The ones I've owned all did.
 

LSM360

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My '89 Diplomat AHB alternator is what they call "Denso type" 100 amp I THINK? Powermaster tech guy said he believes they had Mitsubishi style and I've never heard that. I asked if they made replacement for my car.

7A7CE218-B286-4092-9E7F-3C3DD971594A.jpeg
 

Aspen500

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I had a '78 Cordoba with lock up, and it locked at 35 mph. Annoying as heck going 35, lock, unlock, lock, unlock, lock.......if you were on a perfectly level road it was fine except, there is no such thing around here. You're either going up or down to some extent and the slightest increase in throttle would make the converter unlock and then lock again. GRRRRRR.
 

Hayzoos

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It looks like a Denso style. The give-away is the partial case vanes on the front. Very common feature of many Denso model alternators. But it is not exclusive to Denso.
 

BudW

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Anyone know if this is Denso style?
Yes.

It is the Denso, which is short for Nippendenso. Denso makes a lot of alternators for a lot of different makes of vehicles.
Chrysler used them on all small blocks starting for '88.
Well, almost all small blocks. There was the 120a (new Chrysler) alternator, aka plastic-back, as an option. and in some cases a 90a Chrysler was used when having supply issues on Denso's.
BudW
 

LSM360

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Will this muddy the waters lol? Back of mine not plastic. I didn't know whether to put this here or your other very informative post. Also, would this style have internal voltage regulator? Thanks!

Edit: just answered my own question by getting off my rear. Found part number and no internal VR (good because I have VR connected) and 120 amp.

F11E6F1A-7F91-4EBD-A090-F1D5651B7FF1.jpeg
 
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